Ore mill and crusher



May 20, 1924.

F. GROSS ORE MILL AND CRUSHBR Filed Nov. 16, 1922 2 Sheets-Sheet 1 May 20, 1924.

"F. GROSS ORE MILL AND CRUSHER 2 Sheets-Sheet 2 Filed Nov. 16] 1922 llll lllllll flan/5 dross of the grinding members.

' is fixed relatively to this disc 15 and rel- Patented May 29, 1924.

UNITED STATES 1,494,684 PATENT OFFICE.

FRANK GROSS, OF COLORADO SPRINGS, COLORADO.

ORE MILL AND CRUSHER.

Application filed November 16, 1922. Serial No. 601,343.

To alt whom it may concern:

Be 1t known that I, FRANK Gnoss, a citizen of the United States, residing at Col orado Springs, in the county of El Paso 5 and State of Colorado, have invented oer tain new and useful Improvements in Ore Mills and Crushers, of which the following is a specification. I

My invention relates to improvements in attrition mills wherein there is provided grinding discs. The invention relates particularly to mills for grinding or crushing ore and the like. I

One of the objects of this invention is 35 to provide a grinding mill wherein one of the grinding discs may be adjusted so that the-ore or the like may be crushed or ground to a greater or less extent, as desired.

Another object of this lnvention 1s to provide an ore mill or crusher wherein the materlal to be crushed or ground is continuously fed to the grinding discs, means being provided for shaking or agitating the accompanying drawings wherein;

Figure 1 is a side elevation of a mill constructed in accordance with my invention;

Fig. 2 is an end elevation of the mill;

Fig. 3 is a vertical sectional view through the mill;

Fig. 4 is a fragmentary sectional View,

taken on the plane indicated by the line 44 in Fig. 3;

Fig. 5 is a fragmentary plan View of one of the grinding discs; and,

Fig. 6 is a fragmentary sectional View of one of the grinding discs.

Referring more particularly to the draw ings wherein like reference characters indicate like parts, it will be noted thatthere is provided a support 10, upon which the mill is mounted. The mill consists of a base 11 which rests upon the support 10 and is preferably bolted thereto by bolts 0 12. From the base 11 there extends supports 13, which journally support a shaft 14. Fixed to one of the supports 18 and formed preferably integrally therewith is a stationary disc 15 which disc forms one The shaft 14 atively to the adjacent bracket support 13, the shaft 14 being provided with a head 16 for a purpose to be more fully hereinafter referredto. I

Revolubly mounted on the shaft 14 is a second grinding disc 17, which disc is adapted to be rotated by a power means yet to be described, for the purpose of crushing or grinding material fed between this disc and the stationary disc .15.

For the purpose of rotating the disc 17 there is provided a gear wheel 18 fixed to the disc 17 preferably by [means of bolts 19. Mounted in journal brackets 20, projecting from the base 11 is a shaft 21 to which shaft is fixed a gear pinion 22. Alsofixed to one end of the shaft 21 is a bell pulley 23 by means of which power is applied to the shaft 21 and through the medium of the gearing 2218 the grinding disc 17 is rotated.

The end of the shaft 14 is threaded as at 24 and mounted thereon is an internal threaded sleeve 25. This sleeve 25 has a smooth exterior which is slidingly mountiii ed in the adjacent supporting bracket 13.

The inner end of the sleeve 25 is formed with a collar 26 which is disposed adjacent a hub portion 27 formed on the rotatable grinding disc 17. Raceways are provided in the abutting faces of the collar 26 and the hub 27 for the reception of balls 28 whereby a thrust bearing connection is pro-,

vided between the sleeve 25 and the grinding disc 17.

Keyed to the outer end of the sleeve 25 is a hand wheel 29, by means of which the sleeve 25 may be rotated and axially displaced relatively to the shaft 14. This displacement of the sleeve 25 controls the distance between the fixed grinding, disc 15 and the rotatable grinding disc 17. A set screw 30 is threaded through the supporting bracket 13 and engages the sleeve 25 and'locks the same in its adjusted positions.

Rockingly mounted on the fixed disc 15 is a hopper 31 into which the material to be ground or crushed is deposited. This hopper is of tapered formation and deposits the material between the discs at the point indicated by the reference character 32. For rocking or "shaking the hopper 31 in order to continuously feed the material between the grinding discs and to dislodge any material that may become lodged therein the following mechanism is provided.

Pivoted as at 33 to the hopper 31 is an arm 34. i A bell crank. 35 pivoted .to the stationary disc as at 36 has one arm thereon pivotally connected to the arm 34 and the other arm to a rod 37. The other end of the rod 37 is pivotally connected to an eccentric strap 38 which engages an eccentric 39 carried by the shaft 21. Therefore as the shaft 21 is rotated a reciprocating motion is imparted to the rod 37 which, through the medium of the bell crank 35 and the arm 34 oscillates or rocks the hop-- per 31. Obviously for this purpose the hopper 31 loosely engages the receiving recess'formed for it in the stationary grinding disc 15.

Either or both of the grinding discs may be provided on one oftheir faces with a plurality of radially extending corrugations 40, which when the disc 17 is rotated, acts upon the material to crush, pulverize and grind the same.

The bottom portion of the stationary disc 15 is cut away as at 41 to communicate with a chute or bin 42, whereby the material that has been reduced is free to discharge into the chute or bin 42 from whence'it may be removed. If desired,a ledge 43 may be provided on the base 11 for preventing the escape of any of the ground material.

The amount of clearance between the discs. 15 and 17 is controlled by means of the sleeve 25 on the one hand and the collar 16 on the other. By rotating the hand wheel 29 the sleeve 25 is displaced axially of the shaft 14, whereupon the disc 17 may move along the shaft 14 until it engages the thrust bearing 28, whereupon further movement is prevented, the collar 16 preventing an axial displacement of'the shaft 14. The sleeve 25 may be locked in its adjusted position by the set screw 30.

It will be noted that the pinion 22 is Wider than the gear 18 thereby permitting an adjustment of the disc 17 within certain limits.

' As power is applied to the pulley 22, the disc 17 will be rotated and also through the medium of the eccentric cam and the arms connected thereto the hopper 31 is rocked or oscillated so as to cause the material dumped therein to be continuously fed between the grinding discs. Obviously, as the material is ground it is permittedto escape by gravity from between the discs at the lower edge thereof and into the chute or receptacle 42. i

From the foregoing it will be immediately apparent that an attrition mill is pro.-

vided wherein the material may be ground coarse or fine, as the occasion demands. The

' arrangement of parts is such that this may be accomplished quickly and easily and the structural details of the mill are such that the same may be cheaply and easily constructed and at the same time in such a durable manner as to make the same commercially eflicient.

Obvious modifications will suggest themselves and therefore I donot wish to be unnecessarily limited but reserve the right to make such changes in the specific form illustrated and described as may come within the purview of the accompanying claims.

Having thus described my invention what I claim is:

1. In a grinding mill of the class described, a base provided with a pair of supporting members projecting therefrom, a shaft carried by said supporting members, a fixed grinding disc secured to one of said supporting members, a second grinding disc rotatably mounted on said shaft and axially displaceable thereon, an adjustable sleeve threadedly mounted on said shaft and engaging said second disc for regulating its position with reference to said first disc, a hand wheel for adjusting said sleeve, a set screw for locking said sleeve in its adj usted positions, and gear and pinion means for rotating said second disc.

. 2. In a grind'ng mill of the class described, a base, a pair of supports projecting from said base, a shaft mounted on said supports, a grinding disc fixed toone of said supports, a second grinding disc rotatably mounted on said shaft, an adjustable sleeve threaded on said shaft, a hand wheel for adjusting said sleeve, a thrust bearing interposed between said sleeve and said rotatable grinding disc, said sleeve forming one part of said thrust bearing, whereby the position of said second disc with reference to said first mentioned grinding disc may be regulated, means for locking said sleeve in its adjusted position, and gearing including a gear wheel secured to said rotatable disc for rotating said disc. 3. In a grinding mill of the class described, a stationary grinding disc, a shaft concentric therewith, a second grinding disc rotatably mounted on said shaft, means for varying the position of said second disc with reference to said first disc, a hopper rockingly supported on said first mentioned grinding disc, a power shaft and gear and pinion connection between said power shaft and said rotatable disc, an eccentric cam carried by said power shaft and bell-crank and lever conneotionsbetween said eccentric cam and said he per whereby upon rotation of said power s aft said hopper is rocked.

In testimony whereof I affix my signature.

FRANK ososs. 

